I’m a new frog owner. We had a gray tree frog in our backyard for all of June and July. I loved the sound at night so ... I decided on adding two more pets to the house. I set up a 12x12x18 vivarium and purchased a male and female gray tree frog. They are eating good and moving about so I think I’m doing ok. Can someone tell me when I can expect to hear the male call out. So looking forward to hearing the sound again.